J. Anim Sci.
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J. Anim Sci. 1951. 10:629-637.
© 1951 American Society of Animal Science
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Animal Protein Factor and Antibiotic Supplementation of Small Grain Rations for Swine1

J. P. Bowland, S. E. Beacom2 and L. W. McElroy

University of Alberta3

Abstract

Data are presented on the results of experiments with Yorkshire swine fed basal barley-oat rations supplemented with either all vegetable or mixed animal-vegetable protein.

Pigs receiving an APF supplement without antibiotic gained slightly more rapidly and efficiently than the controls but the difference was generally not significant. The amount of response was somewhat greater on an all vegetable protein ration than on an animal-vegetable protein ration.

An APF supplement containing residual aureomycin caused marked increases in rate and efficiency of gain when added to basal rations containing protein of either vegetable or mixed animal-vegetable origin. Unthrifty weanling pigs gave a very great response in increased rate and efficiency of gains to this APF supplement.

There appeared to be a reduction in carcass quality of bacon-type hogs receiving APF supplementation throughout the growing and fattening period. This was particularly noticeable in those receiving a ration supplemented with APF containing aureomycin.

Footnotes

1 Acknowledgement is made to Mr. H. Johannson, Merck and Co. Ltd., Montreal, for supplying Merck APF-3, and to Dr. T. H. Jukes, Lederle Laboratories, Pearl River, New York, for supplying Lederle APF-5. Representatives of the Production Service, Canadian Department of Agriculture, co-operated in carrying out the cutting and scoring of carcasses by Advanced Registry standards.

2 Experiments 2, 3 and 4 were conducted in partial fulfillment of the requirements for the degree of Master of Science.

3 Department of Animal Science, Edmonton, Alberta, Canada.






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Copyright © 1951 by the American Society of Animal Science.